Maritime string height

That is .138", way too high. That will be very hard to play. I prefer .093" (3/32") or 2.4mm.

A guitar that is hard to play is a guitar that isn't played.

You'll need to find a decent guitar tech or luthier to do a setup, to check not only the action, but also the nut action and neck relief.

It was mentioned in one of threads that this might happen. Many guitar nanufacturers ship guitars with the action high. Maybe with the intention of the guitar shop dialing it in for the customer. It's easier to bring the action diwn than up. Some places will do it for free when you buy a guitar. That doesn't help online customers much. It will probably cost you less to get the setup done than to send it back.

I saw someone on the AGF mention these sales are a way to get rid of returned goods. It probably was said sarcasrically, but maybe there's some truth.

dotty,

Just a thought, mean this in the nicest way but are you checking the height of the sixth string correctly, the measurement should be taken from the top of the twelfth fret to the under side of the sixth string the big fat one, as 3.5mm is excessive for any guitar.